CVE-2021-46756: Input Validation

Published May 9, 2023

Updated

Insufficient validation of inputs in SVCMAPUSERSTACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

Affected Software

252 affected components

All of the following

AMD Epyc 72f3 Firmware=milanpi_1.0.0.9

AMD Epyc 72f3

All of the following

AMD Epyc 7313 Firmware=milanpi_1.0.0.9

AMD Epyc 7313

All of the following

AMD Epyc 7313p Firmware=milanpi_1.0.0.9

AMD Epyc 7313p

All of the following

AMD Epyc 7343 Firmware=milanpi_1.0.0.9

AMD Epyc 7343

All of the following

AMD Epyc 7373x Firmware=milanpi_1.0.0.9

AMD Epyc 7373x

All of the following

AMD Epyc 73f3 Firmware=milanpi_1.0.0.9

AMD Epyc 73f3

All of the following

AMD Epyc 7413 Firmware=milanpi_1.0.0.9

AMD Epyc 7413

All of the following

AMD Epyc 7443 Firmware=milanpi_1.0.0.9

AMD Epyc 7443

All of the following

AMD Epyc 7443p Firmware=milanpi_1.0.0.9

AMD Epyc 7443p

All of the following

AMD Epyc 7453 Firmware=milanpi_1.0.0.9

AMD Epyc 7453

All of the following

AMD Epyc 7473x Firmware=milanpi_1.0.0.9

AMD Epyc 7473x

All of the following

AMD Epyc 74f3 Firmware=milanpi_1.0.0.9

AMD Epyc 74f3

All of the following

AMD Epyc 7513 Firmware=milanpi_1.0.0.9

AMD Epyc 7513

All of the following

AMD Epyc 7543 Firmware=milanpi_1.0.0.9

AMD Epyc 7543

All of the following

AMD Epyc 7543p Firmware=milanpi_1.0.0.9

AMD Epyc 7543p

All of the following

AMD Epyc 7573x Firmware=milanpi_1.0.0.9

AMD Epyc 7573x

All of the following

AMD Epyc 75f3 Firmware=milanpi_1.0.0.9

AMD Epyc 75f3

All of the following

AMD Epyc 7643 Firmware=milanpi_1.0.0.9

AMD Epyc 7643

All of the following

AMD Epyc 7663 Firmware=milanpi_1.0.0.9

AMD Epyc 7663

All of the following

AMD Epyc 7713 Firmware=milanpi_1.0.0.9

AMD Epyc 7713

All of the following

AMD Epyc 7713p Firmware=milanpi_1.0.0.9

AMD Epyc 7713p

All of the following

AMD Epyc 7763 Firmware=milanpi_1.0.0.9

AMD Epyc 7763

All of the following

AMD Epyc 7773x Firmware=milanpi_1.0.0.9

AMD Epyc 7773x

All of the following

AMD Epyc 7232p Firmware=romepi_1.0.0.e

AMD Epyc 7232p

All of the following

AMD Epyc 7252 Firmware=romepi_1.0.0.e

AMD Epyc 7252

All of the following

AMD Epyc 7262 Firmware=romepi_1.0.0.e

AMD Epyc 7262

All of the following

AMD Epyc 7272 Firmware=romepi_1.0.0.e

AMD Epyc 7272

All of the following

AMD Epyc 7282 Firmware=romepi_1.0.0.e

AMD Epyc 7282

All of the following

AMD Epyc 7302 Firmware=romepi_1.0.0.e

AMD Epyc 7302

All of the following

AMD Epyc 7302p Firmware=romepi_1.0.0.e

AMD Epyc 7302p

All of the following

AMD Epyc 7352 Firmware=romepi_1.0.0.e

AMD Epyc 7352

All of the following

AMD Epyc 7402 Firmware=romepi_1.0.0.e

AMD Epyc 7402

All of the following

AMD Epyc 7402p Firmware=romepi_1.0.0.e

AMD Epyc 7402p

All of the following

AMD Epyc 7452 Firmware=romepi_1.0.0.e

AMD Epyc 7452

All of the following

AMD Epyc 7502 Firmware=romepi_1.0.0.e

AMD Epyc 7502

All of the following

AMD Epyc 7502p Firmware=romepi_1.0.0.e

AMD Epyc 7502p

All of the following

AMD Epyc 7532 Firmware=romepi_1.0.0.e

AMD Epyc 7532

All of the following

AMD Epyc 7542 Firmware=romepi_1.0.0.e

AMD Epyc 7542

All of the following

AMD Epyc 7552 Firmware=romepi_1.0.0.e

AMD Epyc 7552

All of the following

AMD Epyc 7642 Firmware=romepi_1.0.0.e

AMD Epyc 7642

All of the following

AMD Epyc 7662 Firmware=romepi_1.0.0.e

AMD Epyc 7662

All of the following

AMD Epyc 7702 Firmware=romepi_1.0.0.e

AMD Epyc 7702

All of the following

AMD Epyc 7702p Firmware=romepi_1.0.0.e

AMD Epyc 7702p

All of the following

AMD Epyc 7742 Firmware=romepi_1.0.0.e

AMD Epyc 7742

All of the following

AMD Epyc 7f32 Firmware=romepi_1.0.0.e

AMD Epyc 7f32

All of the following

AMD Epyc 7f52 Firmware=romepi_1.0.0.e

AMD Epyc 7f52

All of the following

AMD Epyc 7f72 Firmware=romepi_1.0.0.e

AMD Epyc 7f72

All of the following

AMD Epyc 7h12 Firmware=romepi_1.0.0.e

AMD Epyc 7h12

All of the following

AMD Epyc 7251 Firmware=naplespi_1.0.0.j

AMD Epyc 7251

All of the following

AMD Epyc 7261 Firmware=naplespi_1.0.0.j

AMD Epyc 7261

All of the following

AMD Epyc 7281 Firmware=naplespi_1.0.0.j

AMD Epyc 7281

All of the following

AMD Epyc 7301 Firmware=naplespi_1.0.0.j

AMD Epyc 7301

All of the following

AMD Epyc 7351 Firmware=naplespi_1.0.0.j

AMD Epyc 7351

All of the following

AMD Epyc 7351p Firmware=naplespi_1.0.0.j

AMD Epyc 7351p

All of the following

AMD Epyc 7371 Firmware=naplespi_1.0.0.j

AMD Epyc 7371

All of the following

AMD Epyc 7401 Firmware=naplespi_1.0.0.j

AMD Epyc 7401

All of the following

AMD Epyc 7401p Firmware=naplespi_1.0.0.j

AMD Epyc 7401p

All of the following

AMD Epyc 7451 Firmware=naplespi_1.0.0.j

AMD Epyc 7451

All of the following

AMD Epyc 7501 Firmware=naplespi_1.0.0.j

AMD Epyc 7501

All of the following

AMD Epyc 7551 Firmware=naplespi_1.0.0.j

AMD Epyc 7551

All of the following

AMD Epyc 7551p Firmware=naplespi_1.0.0.j

AMD Epyc 7551p

All of the following

AMD Epyc 7571 Firmware=naplespi_1.0.0.j

AMD Epyc 7571

All of the following

AMD Epyc 7601 Firmware=naplespi_1.0.0.j

AMD Epyc 7601

AMD Epyc 72f3 Firmware=milanpi_1.0.0.9

AMD Epyc 72f3

AMD Epyc 7313 Firmware=milanpi_1.0.0.9

AMD Epyc 7313

AMD Epyc 7313p Firmware=milanpi_1.0.0.9

AMD Epyc 7313p

AMD Epyc 7343 Firmware=milanpi_1.0.0.9

AMD Epyc 7343

AMD Epyc 7373x Firmware=milanpi_1.0.0.9

AMD Epyc 7373x

AMD Epyc 73f3 Firmware=milanpi_1.0.0.9

AMD Epyc 73f3

AMD Epyc 7413 Firmware=milanpi_1.0.0.9

AMD Epyc 7413

AMD Epyc 7443 Firmware=milanpi_1.0.0.9

AMD Epyc 7443

AMD Epyc 7443p Firmware=milanpi_1.0.0.9

AMD Epyc 7443p

AMD Epyc 7453 Firmware=milanpi_1.0.0.9

AMD Epyc 7453

AMD Epyc 7473x Firmware=milanpi_1.0.0.9

AMD Epyc 7473x

AMD Epyc 74f3 Firmware=milanpi_1.0.0.9

AMD Epyc 74f3

AMD Epyc 7513 Firmware=milanpi_1.0.0.9

AMD Epyc 7513

AMD Epyc 7543 Firmware=milanpi_1.0.0.9

AMD Epyc 7543

AMD Epyc 7543p Firmware=milanpi_1.0.0.9

AMD Epyc 7543p

AMD Epyc 7573x Firmware=milanpi_1.0.0.9

AMD Epyc 7573x

AMD Epyc 75f3 Firmware=milanpi_1.0.0.9

AMD Epyc 75f3

AMD Epyc 7643 Firmware=milanpi_1.0.0.9

AMD Epyc 7643

AMD Epyc 7663 Firmware=milanpi_1.0.0.9

AMD Epyc 7663

AMD Epyc 7713 Firmware=milanpi_1.0.0.9

AMD Epyc 7713

AMD Epyc 7713p Firmware=milanpi_1.0.0.9

AMD Epyc 7713p

AMD Epyc 7763 Firmware=milanpi_1.0.0.9

AMD Epyc 7763

AMD Epyc 7773x Firmware=milanpi_1.0.0.9

AMD Epyc 7773x

AMD Epyc 7232p Firmware=romepi_1.0.0.e

AMD Epyc 7232p

AMD Epyc 7252 Firmware=romepi_1.0.0.e

AMD Epyc 7252

AMD Epyc 7262 Firmware=romepi_1.0.0.e

AMD Epyc 7262

AMD Epyc 7272 Firmware=romepi_1.0.0.e

AMD Epyc 7272

AMD Epyc 7282 Firmware=romepi_1.0.0.e

AMD Epyc 7282

AMD Epyc 7302 Firmware=romepi_1.0.0.e

AMD Epyc 7302

AMD Epyc 7302p Firmware=romepi_1.0.0.e

AMD Epyc 7302p

AMD Epyc 7352 Firmware=romepi_1.0.0.e

AMD Epyc 7352

AMD Epyc 7402 Firmware=romepi_1.0.0.e

AMD Epyc 7402

AMD Epyc 7402p Firmware=romepi_1.0.0.e

AMD Epyc 7402p

AMD Epyc 7452 Firmware=romepi_1.0.0.e

AMD Epyc 7452

AMD Epyc 7502 Firmware=romepi_1.0.0.e

AMD Epyc 7502

AMD Epyc 7502p Firmware=romepi_1.0.0.e

AMD Epyc 7502p

AMD Epyc 7532 Firmware=romepi_1.0.0.e

AMD Epyc 7532

AMD Epyc 7542 Firmware=romepi_1.0.0.e

AMD Epyc 7542

AMD Epyc 7552 Firmware=romepi_1.0.0.e

AMD Epyc 7552

AMD Epyc 7642 Firmware=romepi_1.0.0.e

AMD Epyc 7642

AMD Epyc 7662 Firmware=romepi_1.0.0.e

AMD Epyc 7662

AMD Epyc 7702 Firmware=romepi_1.0.0.e

AMD Epyc 7702

AMD Epyc 7702p Firmware=romepi_1.0.0.e

AMD Epyc 7702p

AMD Epyc 7742 Firmware=romepi_1.0.0.e

AMD Epyc 7742

AMD Epyc 7f32 Firmware=romepi_1.0.0.e

AMD Epyc 7f32

AMD Epyc 7f52 Firmware=romepi_1.0.0.e

AMD Epyc 7f52

AMD Epyc 7f72 Firmware=romepi_1.0.0.e

AMD Epyc 7f72

AMD Epyc 7h12 Firmware=romepi_1.0.0.e

AMD Epyc 7h12

AMD Epyc 7251 Firmware=naplespi_1.0.0.j

AMD Epyc 7251

AMD Epyc 7261 Firmware=naplespi_1.0.0.j

AMD Epyc 7261

AMD Epyc 7281 Firmware=naplespi_1.0.0.j

AMD Epyc 7281

AMD Epyc 7301 Firmware=naplespi_1.0.0.j

AMD Epyc 7301

AMD Epyc 7351 Firmware=naplespi_1.0.0.j

AMD Epyc 7351

AMD Epyc 7351p Firmware=naplespi_1.0.0.j

AMD Epyc 7351p

AMD Epyc 7371 Firmware=naplespi_1.0.0.j

AMD Epyc 7371

AMD Epyc 7401 Firmware=naplespi_1.0.0.j

AMD Epyc 7401

AMD Epyc 7401p Firmware=naplespi_1.0.0.j

AMD Epyc 7401p

AMD Epyc 7451 Firmware=naplespi_1.0.0.j

AMD Epyc 7451

AMD Epyc 7501 Firmware=naplespi_1.0.0.j

AMD Epyc 7501

AMD Epyc 7551 Firmware=naplespi_1.0.0.j

AMD Epyc 7551

AMD Epyc 7551p Firmware=naplespi_1.0.0.j

AMD Epyc 7551p

AMD Epyc 7571 Firmware=naplespi_1.0.0.j

AMD Epyc 7571

AMD Epyc 7601 Firmware=naplespi_1.0.0.j

AMD Epyc 7601

Event History

May 9, 2023

CVE Published

via MITRE·07:00 PM

Data Sourced

via MITRE·07:00 PM

Description

Frequently Asked Questions

What is CVE-2021-46756?

CVE-2021-46756 is a vulnerability in the SVC_MAP_USER_STACK in the ASP bootloader of AMD Secure Processor that may allow an attacker to send malformed syscalls, leading to a denial of service and loss of integrity.

What is the severity of CVE-2021-46756?

CVE-2021-46756 has a severity rating of 9.1, classified as critical.

How can I mitigate CVE-2021-46756?

To mitigate CVE-2021-46756, it is recommended to apply the patches provided by AMD and follow the security guidelines outlined in the provided references.

CVE-2021-46756: Input Validation

Affected Software

Event History

Don't miss critical vulnerabilities

Frequently Asked Questions

What is CVE-2021-46756?

What is the severity of CVE-2021-46756?

How can I mitigate CVE-2021-46756?

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